Unless they’re in an exempted category, the same way most tipped staff can be payed less than minimum wage.
You’d be surprised. Sure, one guy getting overtime won’t matter but it can add up quick. Personnel costs can be a pretty large chunk of expenses for some places.
Some companies leave it to individual supervisors to approve but some you have to route it pretty high up. One company I used to work for it was up to each division. Mine left it up to the managers (who mostly didn’t actually care as long as you were actually doing something) but for the manufacturing division weekend overtime went up to their VP and had to be approved by noon Thursday or it didn’t happen.
If you mean the ones that Kaivax posted, they’re set for Tuesday.